Contamination - Thermo Scientific TRACE GC Ultra Maintenance And Troubleshooting Manual

Chapter 12
Maintaining an Electron Capture Detector
NOTE When packed columns are used, the make-up gas (as carrier gas type) is used only if
strictly required.
WARNING! It is the customer's responsibility to ensure compliance with all local safety
regulations concerning gas supplies.
Hydrogen is a potentially dangerous gas. Mixed with air it may give rise to an
explosive mixture. The use of hydrogen requires the operator's extreme caution due
to the risks involved. For further details concerning hydrogen, please refer to
Hydrogen

Contamination

Detector contamination could be indicated by the following effects in the
chromatogram:
236
on page xvii.
• reduced signal to noise ratio
• high-noise baseline
• baseline drift with changing pulse voltage
• negative dips after peaks
ECD Troubleshooting
Maintenance and Troubleshooting Manual
Using